CVE-2026-64518

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64518", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T15:36:31.794Z", "datePublished": "2026-07-25T09:14:44.603Z", "dateUpdated": "2026-07-25T09:14:44.603Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-25T09:14:44.603Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntcp: Fix out-of-bounds access for twsk in tcp_ao_established_key().\n\nlockdep_sock_is_held() was added in tcp_ao_established_key()\nby the cited commit.\n\nIt can be called from tcp_v[46]_timewait_ack() with twsk.\n\nSince it does not have sk->sk_lock, the lockdep annotation\nresults in out-of-bound access.\n\n $ pahole -C tcp_timewait_sock vmlinux | grep size\n \t/* size: 288, cachelines: 5, members: 8 */\n $ pahole -C sock vmlinux | grep sk_lock\n \tsocket_lock_t sk_lock; /* 440 192 */\n\nLet's not use lockdep_sock_is_held() for TCP_TIME_WAIT."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ipv4/tcp_ao.c"], "versions": [{"version": "051f49d5176613dea88ecf73a101c3a99f4720e9", "lessThan": "87bb3e719042f0030a6dad39118c6a6b2a491ad9", "status": "affected", "versionType": "git"}, {"version": "6b2d11e2d8fc130df4708be0b6b53fd3e6b54cf6", "lessThan": "510db031ba6eb40134f84c90ef963ea4b6dfb878", "status": "affected", "versionType": "git"}, {"version": "6b2d11e2d8fc130df4708be0b6b53fd3e6b54cf6", "lessThan": "29cf64d128c94cf98d1c69d8b2962d39db5ff4c6", "status": "affected", "versionType": "git"}, {"version": "6b2d11e2d8fc130df4708be0b6b53fd3e6b54cf6", "lessThan": "03cb001ef87b3f8d859cf7f96329acf3d6235d29", "status": "affected", "versionType": "git"}, {"version": "6.12.5", "lessThan": "6.12.92", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ipv4/tcp_ao.c"], "versions": [{"version": "6.13", "status": "affected"}, {"version": "0", "lessThan": "6.13", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.92", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.34", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.11", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12.5", "versionEndExcluding": "6.12.92"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "6.18.34"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "7.0.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/87bb3e719042f0030a6dad39118c6a6b2a491ad9"}, {"url": "https://git.kernel.org/stable/c/510db031ba6eb40134f84c90ef963ea4b6dfb878"}, {"url": "https://git.kernel.org/stable/c/29cf64d128c94cf98d1c69d8b2962d39db5ff4c6"}, {"url": "https://git.kernel.org/stable/c/03cb001ef87b3f8d859cf7f96329acf3d6235d29"}], "title": "tcp: Fix out-of-bounds access for twsk in tcp_ao_established_key().", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/ipv4/tcp_ao.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "87bb3e719042f0030a6dad39118c6a6b2a491ad9", "status": "affected", "version": "051f49d5176613dea88ecf73a101c3a99f4720e9", "versionType": "git"}, {"lessThan": "510db031ba6eb40134f84c90ef963ea4b6dfb878", "status": "affected", "version": "6b2d11e2d8fc130df4708be0b6b53fd3e6b54cf6", "versionType": "git"}, {"lessThan": "29cf64d128c94cf98d1c69d8b2962d39db5ff4c6", "status": "affected", "version": "6b2d11e2d8fc130df4708be0b6b53fd3e6b54cf6", "versionType": "git"}, {"lessThan": "03cb001ef87b3f8d859cf7f96329acf3d6235d29", "status": "affected", "version": "6b2d11e2d8fc130df4708be0b6b53fd3e6b54cf6", "versionType": "git"}, {"lessThan": "6.12.92", "status": "affected", "version": "6.12.5", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/ipv4/tcp_ao.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.13"}, {"lessThan": "6.13", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.92", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.34", "versionType": "semver"}, {"lessThanOrEqual": "7.0.*", "status": "unaffected", "version": "7.0.11", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntcp: Fix out-of-bounds access for twsk in tcp_ao_established_key().\n\nlockdep_sock_is_held() was added in tcp_ao_established_key()\nby the cited commit.\n\nIt can be called from tcp_v[46]_timewait_ack() with twsk.\n\nSince it does not have sk->sk_lock, the lockdep annotation\nresults in out-of-bound access.\n\n $ pahole -C tcp_timewait_sock vmlinux | grep size\n \t/* size: 288, cachelines: 5, members: 8 */\n $ pahole -C sock vmlinux | grep sk_lock\n \tsocket_lock_t sk_lock; /* 440 192 */\n\nLet's not use lockdep_sock_is_held() for TCP_TIME_WAIT."}], "id": "CVE-2026-64518", "lastModified": "2026-11-03T18:15:39.353", "metrics": {}, "published": "2026-07-25T10:17:38.080", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/03cb001ef87b3f8d859cf7f96329acf3d6235d29"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/29cf64d128c94cf98d1c69d8b2962d39db5ff4c6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/510db031ba6eb40134f84c90ef963ea4b6dfb878"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/87bb3e719042f0030a6dad39118c6a6b2a491ad9"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: tcp: Fix out-of-bounds access for twsk in tcp_ao_established_key()", "id": "2507183", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507183"}, "csaw": false, "cwe": "CWE-787", "details": ["A flaw was found in the Linux kernel's TCP implementation. An out-of-bounds access vulnerability exists when the `lockdep_sock_is_held()` function is called with a `tcp_timewait_sock` object. This occurs because the `tcp_timewait_sock` object lacks the necessary `sk->sk_lock`, leading to an incorrect lockdep annotation. This issue could potentially lead to system instability or other undefined behavior."], "name": "CVE-2026-64518", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-07-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64518\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64518\nhttps://lore.kernel.org/linux-cve-announce/2026072538-CVE-2026-64518-7bc3@gregkh/T"]}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[051f49d5176613dea88ecf73a101c3a99f4720e9,87bb3e719042f0030a6dad39118c6a6b2a491ad9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6b2d11e2d8fc130df4708be0b6b53fd3e6b54cf6,510db031ba6eb40134f84c90ef963ea4b6dfb878)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6b2d11e2d8fc130df4708be0b6b53fd3e6b54cf6,29cf64d128c94cf98d1c69d8b2962d39db5ff4c6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6b2d11e2d8fc130df4708be0b6b53fd3e6b54cf6,03cb001ef87b3f8d859cf7f96329acf3d6235d29)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.12.5,6.12.92)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "6.13"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.13)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.92,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.34,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.11,7.1.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-07-26T01:15:16.976235+00:00", "updated": "2026-08-02T12:15:18.588599+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}